/* NPN TLS extension client callback. We check that server advertised
the HTTP/2 protocol the nghttp2 library supports. If not, exit
the program. */
static int select_next_proto_cb(SSL* ssl,
unsigned char **out, unsigned char *outlen,
const unsigned char *in, unsigned int inlen,
void *arg)
{
if(nghttp2_select_next_protocol(out, outlen, in, inlen) <= 0) {
errx(1, "Server did not advertise " NGHTTP2_PROTO_VERSION_ID);
}
return SSL_TLSEXT_ERR_OK;
}
static void http2(void)
{
const unsigned char p[] = {
8, 'h', 't', 't', 'p', '/', '1', '.', '1',
5, 'h', '2', '-', '1', '0',
6, 's', 'p', 'd', 'y', '/', '3'
};
unsigned char outlen;
unsigned char* out;
CU_ASSERT(1 == nghttp2_select_next_protocol(&out, &outlen, p, sizeof(p)));
CU_ASSERT(NGHTTP2_PROTO_VERSION_ID_LEN == outlen);
CU_ASSERT(memcmp(NGHTTP2_PROTO_VERSION_ID, out, outlen) == 0);
}
static void no_overlap(void)
{
const unsigned char spdy[] = {
6, 's', 'p', 'd', 'y', '/', '4',
8, 's', 'p', 'd', 'y', '/', '2', '.', '1',
8, 'h', 't', 't', 'p', '/', '1', '.', '0',
};
unsigned char outlen = 0;
unsigned char* out = NULL;
CU_ASSERT(-1 == nghttp2_select_next_protocol(&out, &outlen,
spdy, sizeof(spdy)));
CU_ASSERT(0 == outlen);
CU_ASSERT(NULL == out);
}
static void http11(void)
{
const unsigned char spdy[] = {
6, 's', 'p', 'd', 'y', '/', '4',
8, 's', 'p', 'd', 'y', '/', '2', '.', '1',
8, 'h', 't', 't', 'p', '/', '1', '.', '1',
};
unsigned char outlen;
unsigned char* out;
CU_ASSERT(0 == nghttp2_select_next_protocol(&out, &outlen,
spdy, sizeof(spdy)));
CU_ASSERT(8 == outlen);
CU_ASSERT(memcmp("http/1.1", out, outlen) == 0);
}
static void http2(void)
{
const unsigned char p[] = {
8, 'h', 't', 't', 'p', '/', '1', '.', '1',
17, 'H', 'T', 'T', 'P', '-', 'd', 'r', 'a', 'f', 't', '-', '0', '4', '/',
'2', '.', '0',
6, 's', 'p', 'd', 'y', '/', '3'
};
unsigned char outlen;
unsigned char* out;
CU_ASSERT(1 == nghttp2_select_next_protocol(&out, &outlen, p, sizeof(p)));
CU_ASSERT(17 == outlen);
CU_ASSERT(memcmp("HTTP-draft-04/2.0", out, outlen) == 0);
}
/*
* Callback function for TLS NPN. Since this program only supports
* HTTP/2 protocol, if server does not offer HTTP/2 the nghttp2
* library supports, we terminate program.
*/
static int select_next_proto_cb(SSL* ssl,
unsigned char **out, unsigned char *outlen,
const unsigned char *in, unsigned int inlen,
void *arg)
{
int rv;
/* nghttp2_select_next_protocol() selects HTTP/2 protocol the
nghttp2 library supports. */
rv = nghttp2_select_next_protocol(out, outlen, in, inlen);
if(rv <= 0) {
die("Server did not advertise HTTP/2 protocol");
}
return SSL_TLSEXT_ERR_OK;
}
static int alpn_select_proto_cb(SSL *ssl, const unsigned char **out,
unsigned char *outlen, const unsigned char *in,
unsigned int inlen, void *arg) {
int rv;
(void)ssl;
(void)arg;
rv = nghttp2_select_next_protocol((unsigned char **)out, outlen, in, inlen);
if (rv != 1) {
return SSL_TLSEXT_ERR_NOACK;
}
return SSL_TLSEXT_ERR_OK;
}
